Overchestimate 

To guess a girls breastsize only to find later that the extra cup size came with the bra...

I totally overchestimated Alli... She looked to be a solid B, only to find out she was barely an A!

Overchestimate by Koition February 6, 2010

Overchestimate 

When a friend asks you how big your ex-girlfriends boobs were, but you say they we're one size larger.

Idiot 1: They we're Z cups Dude!
Idiot 2: O.... M.... G!

"Brandon always Overchestimates his ex-girlfriends; That guy is an idiot."

Overchestimate by Tower defense February 4, 2010

Overestimated 

Thinking something will be more than what it is, inflating something.

The girl thought she hit him a lot harder than she actually did, and that it left him unsettled, kind of like an old Luke Skywalker. She had overestimated herself, and wanted other people to do the same thing with her.

Overestimated by Solid Mantis April 25, 2021